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2005

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Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/10645

Spin filtering through ferromagnetic BiMnO3 tunnel barriers

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http://dx.doi.org/10.1103/PhysRevB.72.020406

Abstract

We report on experiments of spin filtering through ultrathin single-crystal layers of the insulating and ferromagnetic oxide BiMnO3 (BMO). The spin polarization of the electrons tunneling from a gold electrode through BMO is analyzed with a counterelectrode of the half-metallic oxide La2/3Sr1/3MnO3 (LSMO). At 3 K we find a 50% change of the tunnel resistances according to whether the magnetizations of BMO and LSMO are parallel or opposite. This effect corresponds to a spin-filtering efficiency of up to 22%. Our results thus show the potential of complex ferromagnetic insulating oxides for spin filtering and injection.

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Materials, Propietats magnètiques, Física de l'estat sòlid

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Magnetic properties and materials, Electron and ion emission by liquids and solids

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Articles publicats en revistes (Física Aplicada)

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GAJEK, M., et al. Spin filtering through ferromagnetic BiMnO3 tunnel barriers. Physical Review B. 2005. Vol. 72, num. 2, pags. 020406-1-020406-4. ISSN 0163-1829. [consulted: 7 of June of 2026]. Available at: https://hdl.handle.net/2445/10645

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